LIBGL_ALWAYS_INDIRECT=1 glxgears fails on latest git on r600 with: X Error of failed request: 255 Major opcode of failed request: 155 (GLX) Minor opcode of failed request: 1 (X_GLXRender) Serial number of failed request: 42 Current serial number in output stream: 164 After rendering one frame. this is on a ATI HD5850. This is 100% repeatable and occures with every opengl app. Direct Rendering works fine. Indirect rendering works with the vesa x11 driver and llvmpipe. xf86-video-ati versus xf86-video-modestetting both fail.
This code in __glXForceCurrent: if (cx->wait && (*cx->wait) (cx, cl, error)) return NULL; calls DRI2WaitSwap, which returns TRUE because there is a pending swap. I suspect something to deal with this went missing at a higher level at some point.
Xorg 1.18.3 and below works fine, xorg 1.18.4 fails.
Looking at the commits between 1.18.3 and 1.18.4 this commit seams pertain to the case: https://cgit.freedesktop.org/xorg/xserver/commit/?h=server-1.18-branch&id=54ba95861e5ae54051d3963e5e7ced7d69a6de7b
(In reply to diplosarus from comment #3) > Looking at the commits between 1.18.3 and 1.18.4 this commit seams pertain > to the case: > https://cgit.freedesktop.org/xorg/xserver/commit/?h=server-1.18- > branch&id=54ba95861e5ae54051d3963e5e7ced7d69a6de7b Does reverting that commit fix it?
(In reply to Michel Dänzer from comment #4) > Does reverting that commit fix it? No sadly not. Also this bug Persists in 1.19.3
Can you bisect between 1.18.3 and 1.18.4?
I tested with xf86-video-ati-7.10.0-23-g733f606d. xorg-server-1.18.4 is good and xorg-server-1.19.0 is bad. Bisected and the result is: 7d33ab0f8c7958b205076f71e4b47c24aace77fd is the first bad commit commit 7d33ab0f8c7958b205076f71e4b47c24aace77fd Author: Adam Jackson <ajax@redhat.com> Date: Tue Jun 28 15:54:44 2016 -0400 dri2: Don't make reference to noClientException noClientException is now never filled in with a meaningful value, it's always -1. The sole caller of this function disregards the error value in any case. Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Adam Jackson <ajax@redhat.com> :040000 040000 50ecf07fd43345192f937697193acbc91086e975 6d6494a0a06aed80c78491b758f7e35bf3059389 M glx Without 7d33ab0f8c7958b205076f71e4b47c24aace77fd, xorg-server-1.19.0 works but xorg-server-1.19.0-587-gbebcc8477 doesn't work. No X error but the following errors in dmesg: [1654246.207734] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.212430] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.220569] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.220790] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.220880] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.236924] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.237176] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.237255] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.248485] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.248810] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.248960] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.265295] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.265866] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.266024] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.281986] radeon 0000:00:01.0: bo ffff90626cd73000 don't has a mapping in vm ffff90624f11d200 [1654246.992998] [drm:radeon_cs_parser_relocs [radeon]] *ERROR* gem object lookup failed 0x4c [1654246.993025] [drm:radeon_cs_ioctl [radeon]] *ERROR* Failed to parse relocation -2!
I've hit this on Ubuntu 18.04 (xorg 1.19.6), modesetting driver. I have opened a bug over there in case someone on that side has time to investigate (https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1776447) Interestingly, if I use VirtualGL as a true GLX proxy.. VGL_READBACK=sync LIBGL_ALWAYS_INDIRECT=1 VGL_DISPLAY=192.168.128.163:0 VGL_LOGO=1 vglrun +v /opt/VirtualGL/bin/glxspheres64 .. which I'm pretty sure it was never designed to do, things run successfully. So IGLX obviously isn't catastrophically broken ..
Created attachment 141901 [details] Xorg log from iglx crash
Somewhere between 1.19 and version 1.20.1 this has goten worse. The Xorg server now crashes after LIBGL_ALWAYS_INDIRECT=1 glxgears. Log attached.
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